Swarfendor- should this topic be splintered off into a new thread?
This is what I have been able to find so far:
The minimum size for icons in Gnome is 64 or 48px. In order to change that, you must pull lout lots of hair.
First, find out what version of Nautilus you have. Open a terminal and type
It should be 3.18 or 3.20...
Once you know your version, visit this site:https://download.gnome.org/sources/nautilus/
and find your version and download it. Select your version, then select the tar file listed. In my case, it was 3.18.2tar.xz
Open a terminal and install the following dependencies:
sudo apt install libgd-dev autotools-dev libexif-dev libexempi-dev libselinux1-dev libtracker-sparql-1.0-dev libext-dev libxml2-dev libgnome-desktop-3-dev
Navigate to the archive you downloaded for Nautilus and unzip it and put it in the Home Folder or a location you prefer.
After you have it unzipped, navigate to "nautilus-icon-info.h" and double click the file to open it. The path on version 3.18.2 was: /nautilus-3.18.2/libnautilus-private. If you have a different version and it is not in the libnautilus-private folder, then you may need to hunt for it.
In the text format file, scroll down to line 30 or so. You will see the following:
Change the values to what you want to use. For example, where you see "#define NAUTILUS_CANVAS_ICON_SIZE_SMALL 64", change the value to 28 if you want that size.
When you are finished, click save (Check for any mistakes before exiting the file).
Now, you must Install this updated version of Nautilus.
Open terminal and CD to "nautilus-3.18.2" or the name of the version you downloaded.
sudo make install
After all that, reboot.
Hopefully, this works out for you and you end up one happy camper. If not. I'm a lousy Linux noob. But let me know, anyway. I looked up and searched earlier but had to rush back out the door. So I read the material and jotted down the download site and folder names on notepad and rushed off. I typed this up when I got home based off memory, a bit of testing and the notes.